<!DOCTYPE html>
<html>
    <head>
	<meta charset="utf-8" />
		<title></title>
<!--[if lt IE 9]><!-->
    		<script src="http://code.jquery.com/jquery-1.11.3.min.js "></script>
<!--<![endif]-->
<!--[if gte IE 9]><!-->
			<script src="https://code.jquery.com/jquery-3.2.1.min.js "></script>
<!--<![endif]-->
	<script>
	$(document).ready(function(){
  $("div").focusin(function(){
    $(this).css("background-color","#FFFFCC");
  });
  $("div").focusout(function(){
    $(this).css("background-color","#FFFFFF");
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});
</script>
</head>
<body>
 
<div style="border: 1px solid black;padding:10px;">
First name: <input type="text"><br>
Last name: <input type="text">
</div>
 
<p>点击输入框获取焦点，点击输入框外的部分失去焦点。</p>
 
</body>
</html>
